embitter
v.
cause bitterness, sour; cause resentment
Embitter
(v. t.)
To make bitter or sad. See Imbitter.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
About
embitter
Verb
1. cause to be bitter or resentful; "These injustices embittered her even more"
(synonym) envenom, acerbate
(cause) resent
(derivation) embitterment